bug:15860114
Savelayers and HW layers both now support shadow casting.
For save layers, the light source should always be correct, for HW
layers, the light source position is set when the layer is created,
and updated when it is resized.
Change-Id: Ie85567dd43c2bb0a0b08fd0bd4db41efa793ac2b
Bug: 16161431
Also re-writes RevealAnimator to avoid using any listeners internally,
removing the logic around shadowing the update listeners.
Change-Id: I6ed8126398eed971a87f20bccb7584c9acafbb6c
Bug: 15978905
Need to make sure we re-sync the UI properties on animator cancel, also
don't animate for 1 frame after cancel() is called
Change-Id: Ib660c0fb195b9f02bd795d03d43ea67bffebb499
Tweaks animators to have less unnecessary refcounting
Pull animator management out into seperate class
More control to tweak animator lifecycle, such as doing
Java-side handling of start delay by attaching but not
starting the animator
Change-Id: I4ff8207580ca11fb38f45ef0007b406e0097281c
